Invoice file clip



FIG. 1 is a left front perspective view of an invoice file clip showing my new design, the structure depicted by means of broken lines being for emvironmental purposes only and forming no part of the claimed design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for an invoice file clip, as shown and described. 